6 G-. and H. Nevill — Descriptions ofneiv Mbllusea. [No. 1, 



certain species of CoralUophUa ; the shell is most remarkably pro- 

 duced at the base into a long, pointed canal, with a deep furrow 

 reaching from its extremity to the narrow umbilicus, the upper 

 whorls are perfectly flat and hidden by a callosity, the body is 

 somewhat flattened and dilated, roughly and handsomely cancel- 

 lated, with the interstices more or less fimbriated. 



Long. 21, Diam. 13|-, Alt. apert. 18 J, (extra canalem 12^), Diam. 

 apert. 8|- m.m. Mauritius. 



Mangelia bieinctula, n. sp., PI. I. Fig. 15, 15a. 



T. turrito-fusiformis, solidula, nitida, fusco-albida, supra et infra 

 inclistincter griseo-fulve cincta ; anfractibus 6, ad suturam anguste 

 constrictis, sub-cylindricis, ultimo basi attenuate, distincter castaneo 

 tincto, canali recto, brevi, latiuscule desinente, anf. omninis costulis 

 crassiusculis transversis, rectis, et striis spiralibus tenuibus et 

 confertis ornatis ; apertura angusta, postice angulata ; labro ex- 

 terne valde incrassato, albo, postice vix emarginato, intus indis- 

 tincter crenulato, labio tenuissimo, haud distincter designato, an- 

 tice paululum ruguloso. 



Long. 13, Diam. 4|-, Long, anfract. ult. 8 J, Alt. apert. 6|-, 

 Diam. apert. 2 m. m. 



S. Province, Ceylon. 



Helix Newtoni, n. sp. 



This small species is composed of 6 flattened whorls, much com- 

 pressed, bearing above considerable resemblance to our common 

 English H. rotundata ; suture very distinct, somewhat excavated ; 

 aperture small, nearly as high as broad, somewhat angular ; 

 margin of the lip simple ; deeply umbilicated, reminding one a 

 little of certain species of the genus Solarium, increased by its most- 

 striking characteristic, a row of crenulated, fold-like, closely approx- 

 imated strise, which surround the umbilicus and extend over about 

 two-thirds of the base. Very rare, Pouce Mt. Mauritius. 



Helix (Discus) LeVieuxi, n. sp. 



This beautiful little species, which is named after Mr. Le Vieux 

 of Mauritius, possessor of an extremely fine collection of shells 



